live migration: Allow cleanup after cancellation or error

Introduce qemu_savevm_state_cancel and inject a stage -1 to cancel a
live migration. This gives the involved subsystems a chance to clean up
dynamically allocated resources. Namely, the block migration layer can
now free its device descriptors and pending blocks.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/sysemu.h b/sysemu.h
index 70a2b044df..0149bd16c2 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -65,6 +65,7 @@ void main_loop_wait(int timeout);
 int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared);
 int qemu_savevm_state_iterate(QEMUFile *f);
 int qemu_savevm_state_complete(QEMUFile *f);
+void qemu_savevm_state_cancel(QEMUFile *f);
 int qemu_savevm_state(QEMUFile *f);
 int qemu_loadvm_state(QEMUFile *f);